906 Head shop

I really do not see an issue with building what ya got and since you have them all ready, that is less money spent? Should the head not fit the bill of the build, ET/speed wise, then another head maybe in order.

Back cutting the valves on a multi angle valve job and a porting job costs more than new heads? Flow numbers aren't everything nor is ultimate power out of the heads being used. Sometimes a simple upgrade over stock is enuff.

Then there's all ways loosing weight.

I think IQ52's post shows great potential from a iron head and IMO would produce some very good power for the street or a S/S ride. While a 400 cube engine would make best use of this flow and the 440 may need more, it is of course truly a build dependent thing.

280 cfm..........Ported 906 with the 2.08 factory intake valve, same port as above, the #1 or #8, 280/224=25% increase from stock.

299 cfm..........Ported 906 with 2.14 intake valve, same port as above, 299/224=33% increase from stock.

302 cfm..........Ported 906 with 2.20 intake valve, same port as above, 302/224=35% increase from stock.

This is the most recent set of 906 heads (2.25 intake) we flowed: 91 cfm @ .100, 165 cfm @ .200", 219 cfm @ .300", 277 cfm @ .400", 299 cfm @ .500", 325 cfm @ .600", 335 cfm @ .700" and 339 cfm @ .800".

On 7/23/2011, those heads made 694 HP @ 6,900 rpm from a 451ci B-engine with 9.7:1 compression and a single 1050 cfm 4150 4bbl, 91 octane, all motor....no bottle, no boost.

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